Welcome, AniManiac. I'm new here too.

The thing to remember about side effects of any medicine is that not everyone experiences them. Also that everyone reacts differently - I know people who swear by Seroquel, but I can't function on it at a therapeutic level. Conversely Abilify was fantastic for me but I've met others who say they had horrible experiences with it. Psych meds are not an exact science, unfortunately, so it just takes time. If you have an adverse reaction to something, though, you'll know fast (like with the Prozac, I had something almost identical happen to me).

Also, if you exercise regularly and eat well, any weight gain you experience should be minimal, if it happens at all.

Good luck <3